What power supply?

Something like this would do: http://www.newegg.com/Product/Product.aspx?Item=N82E168...

The EVGA 01G-P3-1380-KR GeForce GTX 460 SSC+ is a factory overclocked card.

The minimum power supply requirement is one that is 450 Watts or greater and with a combined +12 Volt rails current rating of 24 Amps or greater. The PSU should also have at least two available 6-pin PCI-E power connectors. Wattage is not the most important specification, it's the DC output current on the combined +12 Volt rail(s) as well as good voltage regulation and low electrical noise and ripple. Reliability is also a major concern.

The replacement power supply should adhere to the standard ATX form factor with the following dimensions: 6" Wide X 3.5" Tall X 5.5" Deep.

What is your budget for the power supply unit?

Here's one I would recommend:

Antec EarthWatts Green EA-430D for $49.99 at newegg.com

80% modular units are a better option in an oem case.=fewer cables to deal with.
http://www.newegg.com/Product/Productcompare.aspx?Submi...

Another very good 80 PLUS BRONZE Certified 520w psu - http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Thanks alot. Im new to all of this. My budget is around like $50-$100 for a power supply but its flexible.

if you live near a microcenter, just pick up the antec 520w. same price, no shipping, same build but with a larger fan.